1 /* 2 * cx18 ioctl control functions 3 * 4 * Derived from ivtv-controls.c 5 * 6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 #include <linux/kernel.h> 19 #include <linux/slab.h> 20 21 #include "cx18-driver.h" 22 #include "cx18-cards.h" 23 #include "cx18-ioctl.h" 24 #include "cx18-audio.h" 25 #include "cx18-mailbox.h" 26 #include "cx18-controls.h" 27 28 static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt) 29 { 30 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 31 int type = cxhdl->stream_type->val; 32 33 if (atomic_read(&cx->ana_capturing) > 0) 34 return -EBUSY; 35 36 if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV || 37 !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS || 38 type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD || 39 type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) { 40 /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */ 41 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE; 42 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into the MPEG stream\n"); 43 return 0; 44 } 45 46 /* Allocate sliced VBI buffers if needed. */ 47 if (cx->vbi.sliced_mpeg_data[0] == NULL) { 48 int i; 49 50 for (i = 0; i < CX18_VBI_FRAMES; i++) { 51 cx->vbi.sliced_mpeg_data[i] = 52 kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL); 53 if (cx->vbi.sliced_mpeg_data[i] == NULL) { 54 while (--i >= 0) { 55 kfree(cx->vbi.sliced_mpeg_data[i]); 56 cx->vbi.sliced_mpeg_data[i] = NULL; 57 } 58 cx->vbi.insert_mpeg = 59 V4L2_MPEG_STREAM_VBI_FMT_NONE; 60 CX18_WARN("Unable to allocate buffers for sliced VBI data insertion\n"); 61 return -ENOMEM; 62 } 63 } 64 } 65 66 cx->vbi.insert_mpeg = fmt; 67 CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,when sliced VBI is enabled\n"); 68 69 /* 70 * If our current settings have no lines set for capture, store a valid, 71 * default set of service lines to capture, in our current settings. 72 */ 73 if (cx18_get_service_set(cx->vbi.sliced_in) == 0) { 74 if (cx->is_60hz) 75 cx->vbi.sliced_in->service_set = 76 V4L2_SLICED_CAPTION_525; 77 else 78 cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625; 79 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz); 80 } 81 return 0; 82 } 83 84 static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val) 85 { 86 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 87 int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1; 88 struct v4l2_subdev_format format = { 89 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 90 }; 91 struct v4l2_mbus_framefmt *fmt = &format.format; 92 93 /* fix videodecoder resolution */ 94 fmt->width = cxhdl->width / (is_mpeg1 ? 2 : 1); 95 fmt->height = cxhdl->height; 96 fmt->code = MEDIA_BUS_FMT_FIXED; 97 v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format); 98 return 0; 99 } 100 101 static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx) 102 { 103 static const u32 freqs[3] = { 44100, 48000, 32000 }; 104 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 105 106 /* The audio clock of the digitizer must match the codec sample 107 rate otherwise you get some very strange effects. */ 108 if (idx < ARRAY_SIZE(freqs)) 109 cx18_call_all(cx, audio, s_clock_freq, freqs[idx]); 110 return 0; 111 } 112 113 static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val) 114 { 115 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 116 117 cx->dualwatch_stereo_mode = val; 118 return 0; 119 } 120 121 const struct cx2341x_handler_ops cx18_cxhdl_ops = { 122 .s_audio_mode = cx18_s_audio_mode, 123 .s_audio_sampling_freq = cx18_s_audio_sampling_freq, 124 .s_video_encoding = cx18_s_video_encoding, 125 .s_stream_vbi_fmt = cx18_s_stream_vbi_fmt, 126 }; 127